21813100

素因数分解:

$2^2\times 5^2\times {\mathrm{218131}}^1$

素因数の和:218145

約数の個数: 18

約数和(自身を含む): 47334644

約数和(自身を除く): 25521544

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 218131, 436262, 872524, 1090655, 2181310, 4362620, 5453275, 10906550, 21813100]

約数ペア:

[(1, 21813100), (2, 10906550), (4, 5453275), (5, 4362620), (10, 2181310), (20, 1090655), (25, 872524), (50, 436262), (100, 218131)]